Mrak - cloud
It is given segment AB, which is 12 cm in length, on which one side of the square MRAK is laid. MRAK's side length is 2 cm shown. MRAK gradually flips along the line segment AB, and point R leaves a paper trail.
Draw the whole track of point R until the square can do the line AB on both sides and returns to its original position.
Draw the whole track of point R until the square can do the line AB on both sides and returns to its original position.
Correct answer:

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